A Bank of England working group approved SONIA - which stands for the Sterling Overnight Index Average - as its preferred short-term interest rate benchmark, the central bank said.

The SONIA index tracks the rates of actual overnight funding deals on the wholesale money markets, rather than relying on submitters, and its use will minimise "opportunities for misconduct," the Bank of England said.

Chris Salmon, the Bank of England's executive director for markets, said: "This is an important milestone in the benchmark reform process outlined by the Financial Stability Board (FSB). Work must now begin on planning for the widespread adoption of SONIA, in consultation with a broader set of market participants."

The group chose the SONIA rate with a more than two-thirds majority "based on robust transaction volumes" and how well it measures overnight interest rates "that are considered close to risk-free." SONIA has been around for 20 years,

The Libor manipulation scandal, which hit four years after the 2008 financial crisis, risked breaking trust in London's ability to function as a financial centre.

Libor, a benchmark underpinning more than $300 trillion in loans and derivatives, was set by a panel of banks that submitted short-term borrowing rates to the British Bankers' Association at the time of the scandal.

Regulators found that traders and rate-setters had colluded to shift the rate, benefiting the traders' positions and leading to billions of pounds in fines from US and UK regulators. Libor has since been reformed, and is no longer compiled by the BBA.

The FSB, which is chaired by BoE Governor Mark Carney, started to reform interest rate benchmarks in 2014, and the BoE set up its working group on Libor alternatives in 2015.